Drop-hammer.



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PATENTED JUNE 7, 1904,

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DROP HAMMER.l

H. M. sIMoNsoN.

APPLICATION FILED D'O. l, 1903.'

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. H. M. 'slMoNsoM :0R03 HAMMER. APPLICATION FILED DEO.1. 1903.

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mx/5" 1 i w @717i Patented June 7, 1904.

UNITED STATES PATENT OEEICE.

HANS MARTIN SIMONSON, OE PROVIDENCE, RHODE ISLAND.

DROP-HAMMER.

SPECIFICATION forming part of Letters 'Patent No. 761,923, dated June '7, 1904.

Application filed December 1, 1903. Serial No. 185,360. (No model.)

T0 cr/ZZ whom t may concern:

Be it known that I, HANS MARTIN SrMoNsoN, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new.

and useful Improvement in Drop-Hammers, of which the following is a specification.

This invention has reference to an improvement in drop-hammers, and more particularly to an improvement in the construction of the mechanism for operating the drop.

rPhe object of my invention is to improve the construction of a drop-hammer and by this improved construction to facilitate the operation of the machine.

My invention consists in the peculiar and novel construction of a drophammer whereby the drop is controlled by hand, foot, or automatically by the following mechanism: a power driven roll frictionally engaging with a roll on an eccentric shaft,'said roll on the eccentric shaft forming a drum on which the droprope is wound to raise the drop, a vertical bar operatively connected with the eccentric shaft, a hand-lever engaging with the vertical bar, the operative movement of which raises the'bar and partially rotates the eccentric shaft to disengage the friction-rolls and release the drop, a foot-lever operatively connected with an eccentric shaft on which is 'a brake-bar adapted to engage with the. pe-

riphery of the friction-roll forming the droprope drum and a pawl adapted to engage with a finger on the eccentric shaft of the drops rope drum, a movement of the foot-lever operating to partially rotate the eccentric shafts to release the brake-bar and disengage the.

friction-rolls to release the drop, a catch on the vertical bar adapted to engage with a stud on the frame when the bar is raised, an adjustable arm on the vertical bar, arpin on the drop, an adjustable cam-surface on the vertical bar,the upward movement ofthe drop operating to raise the vertical bar, which is held by the catch until released by the pin on the drop striking the 'cam-surface on the barv in the fall of the drop, means for exerting a spring tension on the drop-rope, and other details of construction, as will be more fully set forth hereinafter.

Figure 1 isa front view of my improved drop-hammer, showing the operating parts in their relative positions with the drop down. Fig. 2 is a side view of the drop-hammer, showing the mechanism connecting the vertical bar and the foot-lever with the eccentric shafts controlling the driven friction-roll and the brake-bar. Fig. 3 is a top view of the drop-hammer, showing the driven frictionroll having thecentral drum for the drop-rope and the outside drum :for the rope of the spring-tension device. Fig. 4: is an enlarged detail sectional view taken on line X X of Fig. 1, showing the mechanism for operating the eccentric shafts. Fig. 5 is an enlarged detail sectional view taken on line Y Y of Fig. l, showing the construction of the frictionrolls, eccentric shafts, and brake-bar; and Fig. 6 is an enlarged detail sectional View taken on line Z Z of Fig. 1, showing the mechanism for exerting a spring tension on the droprope. Fig. 7 is an enlarged detail view of the arm 765, illustrating the operation of thepivoted pawl 71:7.

In the drawings, a indicates the frame of the machine; b, the drop; c, the driving-shaft; d,

the pulley; e, the driving friction-roll; f, the

driven friction-roll; g, the vertical operatingbar; 71 the hand-lever; rl, the clutch-bar; 70, the foot-lever, and Z the spring-tension device.

The frame a has the usualY base fr', supporting the vertical frames t2 a2, having the ways (a3 e3 for the drop and the bearings af a* and es a5. The cross-frame e is secured to the top of the vertical frames o2 a2 and has the bearings 07 o7. The drop I) slides on the ways a t3 and has the eye b, to which the drop-rope b2 is secured, and the pin b3, extending outward from the face of the drop.

The driving-shaft cis supported in the bearings af of and carries the driving-pulley Z on theleft-hand end and the driving friction-roll e between the bearings a* (ai. The driven friction-rol-l f is supported on the eccentric shaft lf', which has the offset ends f2 f2 supported to 'form the depressed central drum f, on which the drop-rope 52 is wound to lift the drop, and the outside drum f", on which the rope of the spring-tension device 7 is wound in the reverse direction.

The vertical operating-bar g has the lower end g', shaped to form the catch g2, adapted to engage with the stud g3 011 the frame, the adjustable slide g", having the cam-surface and secured by the bolt y, the arm gl, adjustably secured by the bolt g8, and the contracted upper end g, having the cross-pin g1". The arm gu is secured to the offset end f 2 of the eccentric shaftf by the bolt g1g and has the vertical slots Q13 gw for the cross-pin gw in its forward end.

The hand-lever 7L is pivotally secured by the screw 7L to the stud 7a2 on the right-hand vertical frame a2 and has the curved arm 7b3, bearing on the side of the operating-bar g, and the curved arm 7b", adapted vto engage with the lower end of the operating-bar, as shown in Fig. 1. The coil-spring 7L is secured to the arm 7Let and to the pin 75 on the frame a2 and exerts a spring tension on the arm 7b3 to Jforce the lower end of the bar g inward.

The brake c' is pivotally supported on the eccentric shaft c", having the offset ends w12 supported in the bearings (t7 al on the crossframe a. The bar has the square edge ff and the roll f/. In its operative position the bar rests on the cross-frame a, the square edge 3 acting as a brake on the peripheral surface of the driven friction-roll f. To limit the movement of the brake-bar z', the curved arm '115, having the roll t, may be used. This arm is removably secured to the top of the brakebar by the thumb-screw vf, as shown in Fig. 5.

The foot-lever 7; is pivotally secured near its center to the stud 7; on the base d. EX- tending upward from the rear end of the footlever is the rod 7a2, pivotally secured to the foot-lever and to the arm 7r:3,which is secured to the right-hand offset end of the eccentric shaft a" by the bolt 7i", as shown in Fig. 2. The arm 7i" is also secured on the offset end by the bolt 7; over the arm g and has the pawl 71:7 pivotally secured to its end in a position to engage with the forwardly-bent end gu of the finger .r/l", forming a part of the arm gu. The pawl 7:7 is constructed to have a Jfree upward movement in the downward movement of the arm 765, as shown in broken lines in Fig. 4, but forms a rigid extension of the arm 705 in its upward movement.

The tension device Z consists of the rope Z', the upper end of which is wound on the drum f" in a reverse direction to that in which the drop-rope b2 is wound on the drum f3, the weight 72, secured to the lower end of the rope 7, the guide-arm 73, extending outward from the frame a2, and the coil-spring Z1, placed intermediate the weight 72 and the arm 73.

In the operation of my improved drop-hammer the friction-roll n is revolved continuously in the direction ot' the arrow by the pulley 7. The friction-roll f by the partial forward rotation of the eccentric shaft lf" is brought into frictional contact with the friction-roll 1 by the weight oi the bar and the arm f/I, secured to the eccentric shaftf', to revolve the friction-roll 7 and wind the drop-rope 7) on the drum]3 to raise the drop 7;. As the drop-rope 7f is wound on the d rum f the rope 7' of the friction device 7 is unwound from the drumf bythe weight on the end of the rope. WV hen the operation of the drop is controlled by hand or automatically, the curved arm ff is removed and the clutch-bar i is thrown out of engagement into the position shown in broken lines in Fig. 5. The handlever 71/ is now depressed. This brings the arm 7x,i ofthe hand-lever into engagement with the lower end of the operating-bar r/, raising the bar, and the arm y partially rotating the eccentric shaftf in a direction to release the friction-rollffrom the friction-roll e, allowing the drop 7) to fall. By this novel arrangement of the mechanism the hand-lever 7/y releases the drop at any point within its upward limit. Then the operation oi the drop is controlled by foot, the foot-lever f is depressed. This gives a partial upward rotation to the eccentric shaft r." through the rod 7? and the arm 7:3 on the eccentric shaft, lifting the brake-bar 21 out of engagement with the friction-roll j and, through the pawl 717 on the arm 7:5, engaging with the linger f/l on the arm g, partiallyrotates the eccentric shaft f to release the friction-roll f from the `frictionroll e and allows the drop to fall at any point desired. When the operation ot' the drop is controlled automatically, the upward movement of the drop brings the pin 71" on thodrop into engagement with the arm .//7 on the operating-bar g. lifting the bar. The pin r/on the upper end of the bar moves upward in the slot al in the arm f7 to allow the catch y"i on the bar r/ to engage with the stud y on the frame before the arm g is raised and the drop released, as described. The spring tension oi the arm 7a3 on the bar (l holds the catch on the stud until the pin 7) on the drop in its descent strikes the cam-surface ff on the bar (f, releasing the catch from the stud and allowing the bar to drop down into its normal position. The arm (/7 is adjusted on the bar lrf' to release the drop at any point desired. In the fall of the drop the rope 7 oi the tension device Z is wound on the drum f, compressing the spring 7i when the blow is struck. As the drop rebounds from the blow the spring 7" takes up the slack ot' the drop-rope 7i", and the brake-bar f/, engaging with the frictionroll f, holds the drop until the next upward movement ot' the drop.

Havingthus described my invention, l claim as new and desire to secure by Letters Patent l. In a* drop-hammer, a power-shaft, a driving friction-roll on the power-shaft, a driven friction-roll on an eccentric shaft, a drum forming a part of the driven friction-roll on which the drop-rope is wound, a brake-bar adapted to engage with the peripheral surface of the driven roll, means for holding the'driven roll in frictional contact with the driving-roll to raise thedrop, means for holding the brakebar in contact with the driven roll to hold the drop, and means for disengaging the driven roll from the driving-roll and the brake-bar from the driven roll to release the drop, as described;

2. In a drop-hammer, a power-shaft, a driving friction-roll on the power-shaft, a driven friction-'roll on an eccentric shaft, a drum forming a part of the driven friction-roll on which the drop-rope is wound, abrake-bar on an eccentric shaft adapted to engage with the peripheral surface of the driven roll, means for holding the driven roll in frictional contact with the driving-roll to raise the drop, means for holding the brake-bar in contact with the driven roll to hold the drop, and means for operating the eccentric shafts to disengage the driven roll from the drivingroll and the brake-bar from the driven roll to release the drop, as described.

3. In a drop-hammer, a power-shaft, a driving friction-roll on the power-shaft, an eccentric shaft, a driven friction-rollon the eccentric shaft, a drum forming a part of the driven friction-roll, a drop, a rope secured to the drop and wound on the drum on the driven roll, a brake-bar on an eccentric shaft adapted to engage with the peripheral surface of the driven roll, means for holding the driven roll in frictional contact with the driving-roll to raise the drop, means for holding the brake-bar in contact with the driven roll to hold the drop,means for operating the eccentric shafts to disenga ge the driven roll from the driving-roll, and the brake-bar from the driven roll to release the drop, and means for taking up the slack of the drop-rope in the rebound of the drop from the blow and holding the drop until the next up ward movement of the drop, as described.

4. In a drop-hammer, the combination of mechanism for operating the drop, comprising a drum on which the drop-rope is wound, an auxiliary drum operating with the drop rope drum, a brake adapted to hold the drop-rope drum,mechanism for taking up the slack of the drop-rope in the rebound of the drop consisting of a rope wound on the auxiliary drum ina reverse direction to that in which the drop-rope is wound and extending downward through an arm on the frame, a weight on the lower end of the rope, and a coil-spring intermediate the weight and the arm, and means for operating the brake to release the drop, as described.

5. The combination in a dro -hammer of a' power shaft, adriving friction roll on the power-shaft, an eccentric shaft, a driven friction-roll on the eccentric shaft having a drum on which the drop-rope is wound, the drop, and an auxiliary drum, a rope on the auxiliary drum extending downward through an arm on the frame, a weight on the rope, a coil-spring intermediate the arm and the weight, an arm on the eccentric shaft having an upwardly-extending finger, a vertical bar pivotally connected to the arm and having a catch, an adjustable arm, and an adjustable cam-surface, a stud on the frame, a pin on the drop, a hand-lever shaped to engage with the side and lower end of the vertical bar, a spring connected with the hand-lever and to the frame, an auxiliary eccentric shaft, a brake-bar on the auxiliary eccentric shaft, a roll on the brake-bar, an arm on the auxiliary eccentric shaft, a pawl on the arm, a foot-lever, means for disengaging the brake -bar, and means for limiting the movement of the brakebar, as described. 4

In testimony whereof I have signed my name to this specification in the presence of two sub* scribing witnesses. Y

HANS MARTIN SIMON SON. Witnesses:

ADA E. HAGERTY, J. A. MILLER, '.Ir. 

